<!Doctype>
<html>
<head>
<title></title>
<style>
.header{
height:100px;
width:100%;
border:1px solid red;
}
.left{
height:900px;
width:15%;
border:1px solid blue;
margin:0px;
}
.right{
height:500px;
width:300px;
border:1px solid black;
float:left;
}

</style>

</head>
<body>
<div>
<div class="header">
<p>top<p>
</div>

<div class="left">
<p>left</p>
</div>

<div class="right">
<p>right</p>
</div>

</div>
</body>
</html>